Fourteen experienced users of two commercial spreadsheet packages, Lotus 123 andMultiplan, performed four tasks - two of entering spreadsheets and two of modifyingthose same spreadsheets. Their actions were videotaped and analyzed for incidents oferrors. Over 450 errors were made, the majority...

Numerous software products claiming to improve work group productivity are makingtheir way into the marketplace. How is a manager to decide whether or not to invest inthese products? This paper proposes a suitable method of formulating the evaluationproblem for work group application products....

Experienced data entry operators participated in an experiment to evaluatethe effects of the error notification timing on error correction performance irtthe data entry task. Three timing strategies were studied: immediate errornotification, notification at the end of a field, and notification...

Much of transaction processing involves classification, that is, the categorization ofinputs into outputs based on various tests. In Artificial Intelligence (Al), classificationsystems are generally represented in terms of AND/OR graphs. Such graphs arecollections of production rules that...